Ventilator for cars.



L. B. J. THURSTON. VENTILATOR FOB GARS.

LPPLIoATloN FILED Nov. f4, 1907.

905,957. Patented Dec.4 s, 1908.

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`LAMBERTON BERTIE JOI-IN THURSTON, OF STRATFORD, ONTARIO, CANADA.

VEN TILATOR FOR CARS.

Application filed. November 4, 1907.

Specification of Letters Patent.

. Patented Dec'. 8, 1908.

Serial No. 400,712.

To all whom it may concern:

Be it known that I, LAMBERTON BERTIE JOHN THUnsToN, a citizen of theUnited States, a resident of the city of Stratford, in the county ofPerth, in the Province of Ontario, Canada, have invented certain new anduseful Improvements in Ventilators for Cars, of which the following isthe specification.

My invention relates to car ventilators, and the object is to provide aventilator which is cheap and simple in'construction, and yet veryefficient, and which can be installed on any car. means of the deviceillustrated in the accompanying drawings, in which:

Figure 1, is a perspective view showing a portion of a car with two ofmy ventilators in place. Fig. 2, is an enlarged elevation of myventilator looking from the interior of the car, and Fig. 3 is asectional plan as in Fig. 2.

Throughout the several views, like characters of reference refer to thesame or corresponding parts.

A is a tube of metal or other suitable material having threaded ends onto which are screwed the elbow ieoes B the outer ends of which are facedo at an angle of about 30o with the tube A.

O and C are offset tubes, the ends of which are beveled and extendthrough the walls of the tube A so as to form inwardly projecting lips DD the tubes being so placed that the bevel of each lip slopes downwardlytoward the end of the tube A nearest to it. The outer ends `of the tubesO and O are threaded and extend through the side E of the car.

F are nuts threaded on the tubes O and O and located outside the car,and G are threaded disks screwed on to the tubes O and O and locatedinside the car. j

By means of the nuts E and disks C, the ventilator may be rigidlyattached to the car.

H is a regulator consisting of a flat plate pivotally mounted betweenthe disks O, and which may be manipulated so as to cover or uncover theends of the tubes C and O.

As shown in the drawings my ventilator is placed on either side of thecar above each window, but I may place it on the roof of the car or inany desired position.

The operation of my ventilator is as follows: Assuming the car to bemoving in the direction indicated by the arrows in Figs. 1 and 2, therelative motion of the air will be in I attain these results by.

the opposite direction. This current of air rushing through the pipe Aimpinges on the lip D. A portion is thereby deflected and passes downthe tube C into the car thus supplying a constant current of fresh air;at the same time, the balance of the air rushing past the tube C (whichit does not enter owing to the manner in which the lip D is formed)produces an entraining actionwhich draws the air from the interior ofthe car through the tube O. Thus there is a constant circulation of airproduced in the car, fresh air is blown in through the tube C and thefoul air is sucked out of the tube O.

Although a definite direction of motion has been assumed for purposes ofillustration, it will readily be understood that the action of myventilator is not aected by a reversal in the direction of motion, theonly effect of such a reversal is that what was formerly the inletbecomes the outlet and vice versa.

As shown in the drawings the elbow pieces B project downwardly. This isnot essentia but gives a neater appearance.

It will be noticed that the beveled formation at the end of the elbows Bpresent lips B exposed to the full rush of air as the car is moving, andconsequently any cinders or flying particles project themselves againstthe lip B and are deflected away from the tube entrance. This I find inpractice, however, does not affect the inrush of air through the tube.Again the plate H may be a spring plate or may be spring held, so thatno matter in what positionit may be set the inlet and outlet is equal.For instance, if it is desired to reduce the amount of ventilation inthe car this is readily accomplished by swinging the plate into aposition to partially close 4the inner ends of both the inlet and outlettubes C and O.

What I claim as my invention is:

1. In a car ventilator, a main tube secured in (position parallel withthe side of the car an communicating with the interior thereof throughthe side of the tube next the car and having end elbows setapproximately at an angle of forty-five degrees to the axis of the tubeand provided with inclined ends, whereby deflecting lips are formedoutside of the main line of the tube as and for the purpose specified.

2. A car ventilator comprising a main tube lying parallel to the side ofthe car, inlet and outlet tubes extending from the main tube through thebody of the oar to the outside thereof, and each tube being provided Igular elbows secured to the ends of the main with a lip at the outsideend projecting into the body of the main tube and located on the sideremote from the end of the tube and a pivotal plate located vat theinside of the tubes whereby the size of the orifice in both inlet andoutlet tubes may be simultaneously regulated as specified.

3. A car ventilator comprising a main tube lying parallel to the side ofthe car, inlet and outlet tubes extending from the main tube through thebody of the car to the inside thereof, and each tube being provided witha lip at the outside end projecting into the body of the main tube andlocated on the side remote from the end of the tube and anl tube andforming deflecting lips outside of the main line of the tube asspecified.

4. A car ventilator comprising a main tubular portion open at both endsand lying parallel to the side of the car, elbows located at the outerends of the tubes, tubes extending from the side of the main tube neXtthe car inwardly through the body of the car and provided with lipsextending into the main body of the tube and fastening nuts screwed onto the inner ends of the tubes as specied.

LAMBERTON BERTIE JOHN THURSTON.

Witnesses:

F. M. GREGORY, W. A. GOETZ.

